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行動 vs. 不行動の後悔

子どもを養子縁組に出すことと、自ら育てる選択をすること

行動した場合

養子に出す・親権を手放す

38%

行動しなかった場合

自分で子どもを育てる

8.0%

それぞれの選択を後で後悔した人の割合。バーと完全な記録は下に表示されます。


家族

最終確認 2026-05-02

証拠の質 4.25/5

8次元のレビュー評価。基準は 品質ルーブリック 。各次元は1〜5で評価。

D1 出典の検証
5/5
D2 出典の権威性と独立性
4/5
D3 後悔率の正確性
3/5
D4 出典の比較可能性
3/5
D5 ギロヴィッチ・パターン
5/5
D6 文章の質
5/5
D7 注意事項の完全性
5/5
D8 サンプルの質
4/5
平均 4.25/5
A signed document resting beside a small pair of infant shoes on a bare table.

行動への後悔

養子に出す・親権を手放す

38%

出産母の38%が引渡し後6か月で実質的な悲嘆を報告(悲嘆代替指標)

米国13州の30の妊産婦居住施設および機関を通じて乳児を養子に出した若い出産母

引渡し後6か月

不作為への後悔

自分で子どもを育てる

8.0%

親の約7-8%が子を持ったことを後悔と報告(一般的な親の後悔、最良の利用可能な代替指標)

米国およびドイツの親、人口調査(代替指標 — 引渡しを検討して親になることを選んだ親を直接調査した研究はない)

横断的;45歳以上の米国成人と18歳以上のドイツ成人で実施された調査

この選択を後悔した割合

action dominates — 行動が優勢 — 多くは行動したことを後悔しています。

関連する決断

意味的に類似する決断 — 同じ領域、異なるトレードオフ。

family

専業 vs 共働き

この選択を後悔した割合

行動が優勢

行動の後悔が1.3倍高い

family

養子縁組を伝えるか隠すか

この選択を後悔した割合

不作為が優勢

不作為の後悔が4.0倍高い

family

子供を持つ

この選択を後悔した割合

均衡

ほぼ均衡

family

老人ホーム vs. 在宅介護

この選択を後悔した割合

行動が優勢

行動の後悔が2.3倍高い

family

IVF vs. 養子縁組

この選択を後悔した割合

行動が優勢

行動の後悔が3.8倍高い

family

早期 vs. 晩期の親になること

この選択を後悔した割合

不作為が優勢

不作為の後悔が1.7倍高い

family

出産方法の選択

この選択を後悔した割合

行動が優勢

行動の後悔が2.7倍高い

lifestyle

ペットを手放すか飼い続けるか

この選択を後悔した割合

不作為が優勢

不作為の後悔が5.7倍高い

38% of birth mothers who place an infant for adoption report substantial grief at 6 months post-placement — roughly five times the rate of general parental regret among those who raise their children. Cushman, Kalmuss & Namerow (1993) documented this figure in a multistate US sample of 215 young birth mothers across 30 agencies in 13 states; a further 27% reported “some” grief at the same timepoint. Madden et al. (2018) — the most contemporary study, n=223 US birth mothers surveyed across placements made between 1993 and 2018 — found a mean satisfaction with relinquishment score of 3.11 on a five-point scale, sitting just above the midpoint, with satisfaction declining further the more years had elapsed since placement. Two variables predicted higher satisfaction: current contact with the adopted child and full-time employment, neither of which is universally available. A 1982 clinical study by Rynearson, drawn from a small psychiatric sample (n=20), documented that only 30% of relinquishing mothers expressed comfort with the adoption; the broader literature review by Askren and Bloom (1999) identified chronic grief as a recurring theme across studies from 1978 through 1994.

The inaction side — what happens to parents who considered relinquishment and chose instead to raise the child — has almost no dedicated evidence. The best available proxy is general population surveys of parental regret: Piotrowski (2021, PLOS ONE), synthesizing US and German survey data, estimates that roughly 7–8% of parents would choose not to have children if they could decide again. The Turnaway Study provides a narrower analogue — women denied abortion who parented reported only 4% regret at five years — though those women sought abortions rather than adoption placements, limiting comparability. Neither figure captures the specific subgroup of birth parents who weighed placement and then chose to parent; that population has not been surveyed directly.

The asymmetry supports an action-dominates pattern, consistent with Gilovich and Medvec’s framework: the active choice to relinquish generates measurable, persistent grief and dissatisfaction in a substantial minority, while raising a child — even an unintended one — tends toward adaptation and acceptance over time. The long time horizon matters: relinquishment grief is not typically acute and resolved, but often delayed and chronic, with Madden et al. finding dissatisfaction intensifying rather than fading with years. The structural confounders are substantial. Coercion history and adoption openness interact powerfully with outcomes; contemporary voluntary open adoptions with ongoing contact produce substantially better results than the closed adoptions that dominated the 1993 cohort. The 0.38 rate should be read as applicable to the mixed-era, mixed-openness population from which it was drawn; the true rate for contemporary voluntary open-adoption placements is almost certainly lower.

出典: 行動

根拠台帳

以下の各数値は各出典が報告した内容であり、引用した原文の抜粋と算出方法を記載しています。リンクをクリックして直接確認できます。

  1. [1] Social Work / Cushman, Kalmuss & Namerow — Placing an Infant for Adoption: The Experiences of Young Birth Mothers
    Placing an Infant for Adoption: The Experiences of Young Birth Mothers
    統計値
    38% of birth mothers felt 'a lot of grief' at 6 months post-placement; 27% felt 'some' grief (n=215, multistate US)
    抜粋
    “"At 6 months after placement, 38% of the placer sample reported feeling a lot of grief, and 27% reported feeling some grief. Higher levels of grief were found in birth mothers whose babies went to foster placement prior to adoptive placement. The majority of birth mothers found signing the adoption papers to be one of the most difficult parts of the adoption process." ”
    出典データ
    1993-05-01
    アクセス日
    2026-05-02
    計算過程
    Cushman, Kalmuss & Namerow (1993) interviewed 215 young women who placed infants through 30 maternity residences and agencies in 13 states — the largest contemporary US multistate birth-mother sample at time of publication. At 6 months post-placement, 38% reported "a lot of grief" and 27% "some grief," making the total experiencing significant grief 65%. We use the "a lot of grief" binary (38%) as the action-side rate because it most closely tracks persistent distress rather than transient sadness. The 6-month timeframe may underestimate lifetime rates: Madden et al. (2018) found satisfaction declined further over time, and the broader chronic-grief literature (Askren & Bloom 1999 review) identifies enduring grief in 40–50% of birth mothers across studies. The grief construct is a proxy for regret; grief and satisfaction are empirically distinct but correlated in this population.
  2. [2] Families in Society / Madden, Ryan, Aguiniga, Killian & Romanchik — The Relationship Between Time and Birth Mother Satisfaction With Relinquishment
    The Relationship Between Time and Birth Mother Satisfaction With Relinquishment
    統計値
    Mean satisfaction with relinquishment score 3.11 on a 1–5 scale; satisfaction declined with time since placement (n=223 US birth mothers)
    抜粋
    “"On a scale of 1 to 5, participants reported a mean satisfaction with relinquishment score of 3.11. Time since relinquishment, age of the respondent, education level, and income had a significant inverse relationship with birth mothers' satisfaction to place their child for adoption. The more time that has passed since the birth mothers placed their child, the less overall satisfaction some birth mothers felt." ”
    出典データ
    2018-06-01
    アクセス日
    2026-05-02
    計算過程
    Madden et al. (2018) surveyed 223 contemporary US birth mothers who placed an infant in the prior 25 years; n=223 is the anchor for the secondary source. The mean satisfaction score of 3.11/5 and its inverse relationship with time corroborate that the 38% acute grief rate from Cushman 1993 persists and may intensify long-term. This study does not publish a binary regret rate but confirms the direction. Two predictors of higher satisfaction — current contact with the adopted child and full-time employment — were present in only a subset of respondents, suggesting 38% is a conservative estimate for the broader birth-mother population.

出典: 不作為

根拠台帳

以下の各数値は各出典が報告した内容であり、引用した原文の抜粋と算出方法を記載しています。リンクをクリックして直接確認できます。

  1. [1] PLOS ONE / Piotrowski — How many parents regret having children and how it is linked to their personality and health: Two studies with national samples in Poland
    How many parents regret having children and how it is linked to their personality and health: Two studies with national samples in Poland
    統計値
    7–8% of parents in US and German population surveys reported regretting having children
    抜粋
    “"On the basis of the surveys conducted in the US and in Germany, it was assumed that the percentage of parents regretting having a child could be around 7–8%." ”
    出典データ
    2021-07-22
    アクセス日
    2026-05-02
    計算過程
    Piotrowski (2021) synthesizes prior US and German survey evidence arriving at a 7–8% prevalence of parental regret in general population samples. This is an imperfect proxy for the inaction side: it measures regret among all parents, not among the specific subgroup who weighed relinquishment and chose to parent. No peer- reviewed study has measured regret among birth parents who considered and declined adoption. The Turnaway Study (Foster et al. 2020) is cited as a partial analogue — 4% of women denied abortion who carried to term expressed regret at 5 years — but those women sought abortions, not adoption placements. We use 0.08 (midpoint of the 7–8% range) as the primary inaction rate. The true rate for parents who specifically considered adoption before choosing to parent has not been measured; it may exceed 8% if their circumstances (ambivalence, resource constraints, social pressure) differ systematically from the general population.
  2. [2] ANSIRH / University of California, San Francisco — The Turnaway Study
    The Turnaway Study

    See all 2 Likelier entries citing this source →

    統計値
    By 5 years after being denied an abortion, 96% of women who carried to term indicated they were glad they had kept their pregnancies (4% regret)
    抜粋
    “"By five years after being denied an abortion, 96% of women turned away indicated they were glad they had kept their pregnancies. One week after being turned away, 60% of the women expressed happiness over their pregnancies. Right after the baby was born, 88% of women no longer wished they had had an abortion." ”
    出典データ
    2022-06-15
    アクセス日
    2026-05-02
    計算過程
    The Turnaway Study followed ~1,000 women at 30 US facilities; the turnaway subgroup (~231 denied abortion) forms the relevant comparison. Only ~9% of turnaways pursued adoption; the majority parented. The 4% regret figure at 5 years is the lowest bound for the inaction side, but these women sought abortion — not adoption — so the comparator is imprecise. We cite Turnaway as a corroborating floor showing similarly low inaction regret and use the Piotrowski 7–8% as primary.

注意事項

Evidence on the two sides is deeply asymmetric. The action side (relinquishment) has a dedicated literature spanning 40+ years, with consistent documentation of grief, loss, and reduced satisfaction across multiple countries and study designs. The inaction side (raising a child one considered relinquishing) has almost no dedicated literature: no peer-reviewed study has directly measured regret among women who weighed adoption and chose to parent instead. The 0.08 inaction rate is borrowed from general-population parental regret surveys (Piotrowski 2021), most of whom never considered adoption at all. The Turnaway Study provides a partial analogue (women denied abortion who parented), but those women sought abortion, not adoption, and the contexts differ materially. The action-side rate (0.38) is the directly-reported "a lot of grief" figure from Cushman, Kalmuss & Namerow (1993), a multistate US sample of 215 birth mothers at 6 months post-placement. Grief is a proxy for regret, not regret itself; the two constructs are empirically related but distinct. Madden et al. (2018) found satisfaction declining further over time, suggesting 0.38 is a floor rather than a ceiling for lifetime dissatisfaction. Rynearson (1982) found 70% discomfort in a small psychiatric outpatient sample (n=20); that figure is not used as the rate because of severe selection bias, but it corroborates that persistent grief in this population is well-documented. Three structural confounders dominate this comparison. First, coercion history: many birth mothers — particularly those who placed before the 1990s — report feeling pressure from family or agencies; coercion is the strongest predictor of poor outcomes, so historical studies overstate regret relative to today's voluntary placements. Second, adoption openness: contemporary open adoptions with ongoing contact produce substantially better outcomes than closed adoptions (Cushman et al. 1997; Madden et al. 2018); the 0.38 figure derives from an era when open adoption was less common. Third, Namerow et al.'s longitudinal study of adolescent mothers found parenters reporting higher regret at 4 years than relinquishers — a finding that would support inaction_dominates — but this was an adolescent pregnancy cohort and has not been replicated in contemporary adult samples. Safe-haven relinquishment (anonymous newborn surrender) is a distinct, rarely-studied pathway not captured in any of these data.

生データ: /api/decisions.json

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